Question 1
Which insecticide has been outlawed in the United States but not in Latin America?
◦ DDT
◦ pyrethrum
◦ inorganic phosphates
◦ biological insecticides
◦ sulfur-containing insecticides
Question 2
Which is NOT a result or effect of irrigation?
◦ increased food production
◦ saltwater intrusion into water supplies
◦ lowered water tables
◦ uplifted land
◦ salinization